Abu Maria al-Qahtani

Maysara Ali bin Musa bin Abdullah al-Jabbouri, also known as Abu Maria al-Qahtani, was the Emir of Eastern Syria under the al-Nusra Front during the Syrian Civil War.

Biography
Maysara Ali bin Musa bin Abdullah al-Jabbouri was born to a family of Sunni Muslim Syrians. He studied at the University of Mosul in Iraq and gained a degree in management; he briefly worked as a police officer before defecting to the jihadist movement during the Iraq War. In 2004, he was arrested for many years for his insurgent activities, and after his release he became an Islamic State of Iraq religious authority in Mosul. Later, he led the religious police, and he managed their relations with the Iraqi tribes until he was arrested once more by the government. At the end of 2011, he moved to Syria, and he became a leader of the al-Nusra Front. He became their military commander and religious authority in eastern Syria, but after the Islamic State launched a massive offensive that took over much of eastern Syria, he was replaced by Sami al-Oraydi.